# Thelma Keller Convention Center Upcoming Events & Trade Show Calendar (2026–2027)

- **Canonical URL:** https://conventions.com/venues/thelma-keller-convention-center-effingham/events
- **Parent Venue Hub:** https://conventions.com/venues/thelma-keller-convention-center-effingham
- **VenueScore™:** 8.5/10 (Effingham Union Jurisdiction Convention Campus)
- **Address:** Thelma Keller Convention Center Campus, Effingham, IL
- **Labor Jurisdiction:** Union Jurisdiction

Audit 1 verified 2026–2027 conventions, trade expositions, and technical congresses hosted at Thelma Keller Convention Center (Thelma Keller Convention Center Campus, Effingham, IL)—complete with hall assignments, hotel rate compression, and direct links to each show's exhibitor and attendee guide.

## Upcoming Flagship Events & Annual Calendar at Thelma Keller Convention Center (1 Mapped Shows)
- **[Illinois Association of Highway Commissioners Annual Seminar 2026](https://conventions.com/events/iahc-annual-seminar)** — Sep 14–16, 2026 | 650+ B2B Attendees | 7.6 / 10 Moderate Corridor Compression
- **Illinois Association of Highway Commissioners Annual Seminar** (Construction & Trades Trade Association & Conference Committee) — 2026-09-14 – 2026-09-16 | 650+ B2B Attendees | Thelma Keller Convention Center Grand Ballroom & General Session Plenary (12,000 sq. ft.) | $39–$47/sf (~$9,150 10×10 Est.)

## 12-Month Compression Matrix
- **JAN (Peak):** Q1 Flagship Trade Show Surge
- **FEB (Peak):** High Association & Expo Demand
- **MAR (Peak):** Peak Spring Convention Window
- **APR (Moderate):** Shoulder Openings Late April
- **MAY (Moderate):** Strong Late-May Negotiation Leverage
- **JUN (Value):** Summer Value Rates Begin
- **JUL (Value):** Maximum Room-Block & Space Concessions
- **AUG (Value):** High Availability & Value Pricing
- **SEP (Moderate):** Fall Season Kickoff
- **OCT (Peak):** Peak Q4 Enterprise Congresses
- **NOV (Moderate):** Early Nov Busy; Late Nov Value
- **DEC (Value):** Mid-December Corporate Value Window